Know that old saw about how the nicest things come in the smallest packages? Works for restaurants, too. Senor Burrito (513 NE 20th St., Boca Raton, 561-347-6600) is a dinky little Mexican place -- four or five booths and a table or two -- that puts out some of the tastiest burritos and enchiladas around. The menu is as limited as the seating, but you can count on everything being fresh and homemade. Sure-fire winners include zingy salsa, tangy tomatillo sauce, and chunky guacamole. If sitting practically in someone else's lap isn't your style, call for an order to go. Items come with so many sides of sour cream, salsa, freshly fried tortilla chips, refried pinto beans, and vegetable-strewn Mexican rice, the staff has to help you out to your car. Which, I'm happy to report, they're glad to do.